CN121224340A

CN121224340A - Driving wheel and cleaning device

Info

Publication number: CN121224340A
Application number: CN202511785979.2A
Authority: CN
Inventors: 王洪宇
Original assignee: Dreame Technology Suzhou Co ltd
Current assignee: Dreame Technology Suzhou Co ltd
Priority date: 2025-09-18
Filing date: 2025-11-28
Publication date: 2025-12-30
Also published as: CN121375365A; CN120941924A

Abstract

This application provides a drive wheel and a cleaning device, relating to the field of drive wheel technology. The drive wheel, used in a cleaning device, includes a tire and an annular body. The annular body has two axial end faces, a first end face and a second end face, respectively. When the tire is mounted on the cleaning device, the first end face is located inside the cleaning device. Multiple first notches are formed on the first end face, spaced apart circumferentially along the annular body. Multiple second notches are formed on the second end face, also spaced apart circumferentially along the annular body. In the radial direction of the annular body, both the first and second notches are recessed from the outer periphery of the annular body towards the center of the annular body. The axial dimension of the first notch is greater than or equal to the axial dimension of the second notch. The drive wheel provided by this application solves the problem of simultaneously reducing noise and improving obstacle-crossing performance in cleaning device drive wheels.

Description

Driving wheel and cleaning device

The present application claims priority from the chinese patent application filed at 18, 09, 2025, filed at the chinese national intellectual property office under application number 202511339850.9, under application name "drive wheel and cleaning apparatus", the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of tires, in particular to a driving wheel and cleaning equipment.

Background

Along with the continuous improvement of living standard, intelligent cleaning equipment such as sweeping robots and the like are becoming an indispensable component in modern families increasingly because people can be liberated from tedious household cleaning work. Users pay attention to the basic cleaning capability of the cleaning equipment, and put higher demands on performance indexes which influence the use experience, such as noise level, obstacle crossing trafficability and the like generated during operation of the cleaning equipment. The driving wheel is a core component of the travel and obstacle surmounting of the cleaning equipment, and the structural design of a tire (or tire skin) directly determines the noise performance and obstacle surmounting capability of the equipment in operation.

However, the tires for driving wheels are difficult to achieve both of the two key performance indexes of noise reduction and obstacle surmounting capability, and a contradictory relationship between the two is formed. Therefore, how to design a tire structure, so that the tire structure can still have excellent obstacle-surmounting capability while keeping quiet running, has become a technical problem to be solved in the art.

Disclosure of Invention

The embodiment of the application provides a driving wheel and cleaning equipment, which are used for solving the problem that the driving wheel of the cleaning equipment in the related art is difficult to reduce noise and improve obstacle crossing performance.

In order to achieve the above object, the embodiment of the present application provides the following technical solutions:

a first aspect of an embodiment of the application provides a drive wheel for a cleaning apparatus, the drive wheel comprising:

The tire comprises an annular main body, wherein the two axial end faces of the annular main body are a first end face and a second end face respectively, when the tire is assembled on the cleaning device, the first end face is located on the inner side of the cleaning device, a plurality of first notches are formed in the first end face and are arranged at intervals along the circumferential direction of the annular main body, a plurality of second notches are formed in the second end face and are arranged at intervals along the circumferential direction of the annular main body, in the radial direction of the annular main body, the first notches and the second notches are recessed from the outer circumferential face of the annular main body to a direction close to the center of the annular main body, and the size of the first notches in the axial direction of the annular main body is larger than or equal to the size of the second notches in the axial direction of the annular main body.

According to the driving wheel provided by the embodiment of the application, the first notch and the second notch are arranged on the two end faces of the annular main body, so that the cooperative improvement of low noise and high obstacle crossing performance can be realized. Specifically, through the size in the axial direction of the first notch on the first end face positioned on the inner side of the cleaning device, the axial size of the second notch which is larger than or equal to that of the second notch positioned on the outer side is arranged, when obstacle crossing is performed, the first notch with larger size provides larger deformation space and better buffering capacity for the inner side of the tire, so that the tire can wrap or attach the edge of the obstacle through the preferential and sufficient deformation of the inner side when encountering the obstacle, larger ground grabbing force and traction force are generated, and the obstacle crossing success rate and stability are effectively improved.

In addition, due to the design of the notches at the two end surfaces, the structural rigidity distribution of the contact area between the tire and the area to be cleaned is optimized when the tire rolls normally on flat ground, and vibration and slapping caused by uneven local deformation of the tread (the contact surface between the tire and the area to be cleaned) are reduced. In particular, with the smaller size of the second gap, the smaller size of the outer second gap maintains the structural integrity of the outer side of the tire to some extent, suppressing excessive lateral vibration and noise emissions, thereby significantly reducing the noise level of the drive wheel as a whole during normal operation.

In summary, the scheme in the embodiment of the application respectively plays different structural advantages under the obstacle surmounting working condition and the steady operation working condition, and finally achieves the synergistic technical effect of taking the excellent obstacle surmounting capability and the low operation noise into consideration.

In one possible implementation, the first notch has a dimension in the axial direction of the annular body that is greater than the dimension of the second notch in the axial direction of the annular body.

So configured, when the cleaning apparatus body rotates and the single drive wheel is preferentially brought into contact with the obstacle during an asynchronous obstacle surmounting, the inner side (first end surface) of the tire which is in rear contact with the obstacle will become the main force-receiving and ground-gripping area. By increasing the axial depth of the inner first notch, the grip at the first notch is significantly increased. Thereby generating larger traction force to assist the cleaner body to smoothly climb over the obstacle, and effectively preventing the driving wheel from slipping or stagnating on the obstacle. The driving wheel can adapt to an asynchronous obstacle crossing scene, and the success rate and the fluency of the cleaning equipment for crossing obstacles such as a threshold, an electric wire, a carpet edge and the like are improved by enhancing the ground grabbing and impact resistance of the inner side. During steady operation, the outer side (the second end face) can keep relatively high radial rigidity and high rigidity due to the smaller size of the second notch, so that abnormal deformation and high-frequency tremble of the tire footprint edges are effectively restrained, and the running noise is reduced from the noise source head.

In one possible implementation, the orthographic projection of the first notch on the first plane and the orthographic projection of the second notch on the first plane do not overlap each other, wherein the first plane is perpendicular to the axial direction of the annular body.

By the arrangement, the axial physical structure of the tire can be maintained to the greatest extent at any radial and circumferential positions of the tire. When deformation occurs at the first notch or the second notch in the obstacle crossing process, continuous solid materials which are not completely cut off by the notch are always arranged at the parts outside the first notch and the second notch to serve as force transmission frameworks, so that more uniform and firmer supporting force is provided, structural collapse or abrupt change of supporting force possibly caused by alignment of the notches at the inner side and the outer side is avoided, and the obstacle crossing process is stable and reliable. In the aspect of noise control, the staggered layout obviously improves the overall structural rigidity of the tire ground grabbing area, effectively inhibits flapping vibration generated by insufficient local rigidity, and radically reduces noise.

In one possible implementation, the orthographic projection of the first notch on the first plane and the orthographic projection of the second notch on the first plane are disposed in sequence along the circumference of the annular body and abut each other.

The arrangement is that orthographic projections of the first notch and the second notch on the first plane are arranged in sequence along the circumferential direction and are adjacent to each other, so that a continuous or approximately continuous circumferential groove layout is formed. The structure enhances the flexibility and the grounding adaptability of the tire, so that the tire can better fit the ground through the elastic deformation of the notch area when encountering uneven ground, thereby improving the obstacle surmounting capacity and the cleaning efficiency of the cleaning equipment. In addition, the contiguous projection design expands the effective drainage or dust removal path of the tire surface, helping to quickly conduct out media in wet or dry cleaning scenarios, preventing skidding or clogging, and improving equipment reliability.

In one possible implementation, the dimension of the first notch in the circumferential direction of the annular body is equal to the dimension of the second notch in the circumferential direction of the annular body.

The arrangement is such that the tire forms a regular and symmetrical mechanical transmission path in the radial direction. When the tire deforms in the obstacle crossing process, the first notch and the second notch on the inner side and the outer side can generate coordinated deformation response, abnormal distortion or stress concentration caused by mismatching of circumferential deformation is avoided, and stability and structural reliability of the driving wheel when climbing over the obstacle are ensured. At the same time, the regular geometric form is also helpful for the tire to keep even contact and separation with the ground during rolling, and reduces vibration and noise caused by irregular impact.

In one possible implementation manner, a first step is formed on two sides of each first notch in the circumferential direction of the annular main body, a second step is formed on two sides of each second notch, and the first step and/or the second step are/is of a solid structure.

By forming the first step on both sides of each first notch and the second step on both sides of each second notch in the circumferential direction of the annular body, the first step and/or the second step is of a solid structure, so that a firm boundary support can be provided for each notch in the circumferential direction of the annular body. When the obstacle crossing is performed, when the notch area is pressed to deform so as to provide necessary ground grabbing force, the solid step structures positioned at the two sides of the notch area can effectively limit the excessive expansion of deformation, and prevent stress from being transferred unordered in the whole tire structure, so that the structural integrity and durability of the tire under the limit deformation can be improved, the problem of tearing of the tire is avoided, and the obstacle crossing action is ensured to be stable and controllable every time.

In addition, the solid step structures can enhance the rigidity of the tire during stable running, and can effectively inhibit high-frequency vibration and noise generated by flexible vibration of the notch edge.

In one possible implementation manner, the outer peripheral surface of the annular main body is provided with a plurality of gear teeth extending along the axial direction of the annular main body, wherein the plurality of gear teeth are arranged at intervals along the circumferential direction of the annular main body, tooth grooves are formed between two adjacent gear teeth, each gear tooth comprises a tooth top surface for being in contact with a surface to be cleaned, the top surface of the first step is a first tangential surface, the top surface of the second step is a second tangential surface, the first tangential surface is lower than the tooth top surface and higher than the bottom of the tooth groove, and/or the second tangential surface is lower than the tooth top surface and higher than the bottom of the tooth groove.

Through setting up a plurality of teeth of a cogwheel, and adjacent tooth piece forms the tooth's socket, can make teeth of a cogwheel and tooth's socket constitute the main driving surface like this, ensures the drive wheel and grabs ground power and clean effect on complicated subaerial such as level ground and carpet. By setting the height of the first tangential surface and/or the second tangential surface between the tooth tip surface and the tooth slot, a secondary functional contact surface can be formed at the first tangential surface and the second tangential surface. When obstacle crossing, when the gear teeth are greatly deformed due to obstacle climbing, tooth tops can be temporarily separated from contact, the first tangential surface and the second tangential surface with moderate positions can be timely contacted with the obstacle, and auxiliary supporting and pushing effects are provided, so that the reliability and stability of obstacle crossing are remarkably improved, and slipping or blocking is prevented. In smooth running, the first tangential surface and the second tangential surface which are lower than the tooth top surface are not contacted with the surface to be cleaned under normal conditions, so that friction noise generated by overlarge contact area is avoided. In addition, through setting up first tangent plane and second tangent plane, can also reduce the weight of tire, reduce the use of material, and then can reduce cost.

In one possible implementation, the first notch has the same dimension in the axial direction of the annular body as the first tangential plane and/or the second notch has the same dimension in the axial direction of the annular body as the second tangential plane.

By this arrangement, it is possible to ensure that the deformation space provided by the notch (first notch and second notch) is completely aligned in the axial direction with the auxiliary support function provided by the tangential plane (first tangential plane and second tangential plane), forming an effective "deformation-support" cooperative unit. When the tire is over the obstacle, stress and the like can be smoothly transferred between the notch deformation area and the tangent plane supporting area, so that stress concentration or local bending caused by size dislocation is avoided, and the structural durability of the tire and the continuity of the obstacle-surmounting action are improved.

In addition, from the viewpoint of the production process, the complexity of the mold can be greatly simplified. The axial boundary of the notch and the axial boundary of the tangent plane are coplanar or formed by the same die structure at one time, so that not only are the component parts and assembly tolerance of the die reduced, but also the demolding difficulty is obviously reduced, the manufacturing precision and batch consistency of the tire are improved, and the cost control and the quality stabilization are facilitated.

In one possible implementation, the first gap spans at least two teeth in the circumferential direction of the annular body, and/or the second gap spans at least two teeth in the circumferential direction of the annular body.

So set up, when the obstacle crossing, when tire and obstacle edge contact, this kind of breach that spans is great (first breach and second breach) can guide a plurality of teeth of a cogwheel to produce the deformation of coordination unanimous simultaneously to form a contact and the parcel face of bigger area between tire and obstacle. The adhesive force during climbing can be enhanced, slipping of single gear teeth due to overlarge stress is effectively prevented, the obstacle surmounting process is stable and continuous, and the capability and success rate of the driving wheel for coping with higher obstacles are remarkably improved. In addition, when the tire rolls, long gaps (a first gap and a second gap) which span a plurality of gear teeth can orderly deform and recover with lower frequency and larger amplitude, and compared with a single gear tooth in a low-frequency deformation mode, the single gear tooth is high-frequency and rapid in slapping, so that the generated working noise is smaller, the tone quality is lower, and the reverse feeling is not easy to induce.

In one possible implementation, the tooth top surface is provided with a plurality of groove structures which are axially arranged at intervals along the annular main body.

By providing the groove structure on the tooth top, the actual contact area and surface roughness of the tooth top when the tooth top contacts the floor to be cleaned (especially the smooth hard floor) can be effectively increased. The friction coefficient and the ground grabbing force of the tire can be obviously enhanced, the phenomenon of slipping and idling of the driving wheel during starting, accelerating or obstacle crossing is prevented, and the high efficiency of power transmission and the running stability of the cleaning equipment are ensured. The spaced groove structures form resilient grooved areas in the tooth top surface that allow for micro-deformation when the drive wheel rolls over small obstacles or ground joints, providing additional cushioning, helping to smoothly ride over obstacles and reducing jolts and shocks.

In addition, the contact area between the tooth top surface and the ground is effectively divided by the groove structures arranged at intervals, and the possible airflow adsorption and vacuum pumping effect of the continuous contact surface are broken, so that the pneumatic noise during high-speed rolling can be reduced. In addition, the groove structures are used as tiny deformation units, so that high-frequency vibration generated when the tire is contacted with the ground micro-uneven part can be absorbed and buffered, and noise is further restrained from being generated from the source.

In one possible implementation manner, the tooth top surface is provided with a central groove, the central groove is positioned in the middle of the annular main body in the axial direction, the size of the central groove in the axial direction of the annular main body is larger than that of any one of the groove structures in the axial direction of the annular main body, and the size of the central groove in the radial direction of the annular main body is the same as that of the groove structures in the radial direction of the annular main body.

Through set up the great central groove of size in the middle part of tooth top, can form a main deformation district at the middle part of tire, when obstacle crossing or need high-force traction, this region can take place moderate deformation preferentially, strengthens the tire and to barrier or wait "interlock" effect of clean face, promotes trafficability characteristic and driving force, and the less groove structure in both sides can then provide supplementary deformation and stable marginal support. In addition, from the perspective of cleaning and drainage, all grooves together form an efficient drainage and debris removal network. Particularly, the large-size central groove is used as a main channel, so that water flow and tiny particles can be rapidly guided to be discharged to two sides, the tire is effectively prevented from skidding on a wet and slippery ground, and dirt is prevented from adhering to the tread to influence the ground grabbing force and the cleaning effect.

In one possible implementation, the tooth tops of the plurality of teeth are all the same in size in the axial direction of the annular body, and both ends of the tooth tops of the plurality of teeth in the axial direction of the annular body are aligned with each other, respectively.

By aligning the tooth tops of the plurality of teeth with each other in axial dimension and with the ends aligned, a continuous, flat effective ground plane is formed. So that the pressure can be uniformly distributed when the driving wheel is in contact with the ground, and local abrasion caused by uneven pressure or shaking of the machine body of the cleaning equipment is avoided, thereby providing stable, efficient and reliable driving performance.

In one possible implementation, the dimension of the first step in the circumferential direction of the annular body is equal to the dimension of the second step in the circumferential direction of the annular body.

By the arrangement, the tires can be ensured to have uniform structural rigidity distribution on the two axial sides, when the tires are subjected to lateral force from different directions or obstacle crossing impact, the deformation response of the inner side and the outer side is symmetrical and synchronous with the force transmission path, so that the problems of deviation, abnormal abrasion or local stress concentration caused by uneven supporting strength on the two sides are effectively avoided, and the running stability and the running durability of the driving wheel are improved.

In one possible implementation, the annular body is provided with a hole-like structure extending along the axial direction of the annular body in the area of the non-solid structure, wherein the hole-like structure corresponding to the first step is communicated with the second notch, and the hole-like structure corresponding to the second step is communicated with the first notch.

By introducing the axial hole-shaped structures at the first step, the second step and the like, the material consumption is obviously reduced, the manufacturing cost is reduced, the rotational inertia of the driving wheel is also lightened, and the quick response and the reduction of the energy consumption during the starting and stopping of the cleaning equipment are facilitated. By communicating the hole-like structure with the external first or second notch, an acoustic damping structure may be formed. When the tire rolls and rubs or impacts the obstacle with the ground to produce vibration and noise, the mutually communicated cavities can effectively block and attenuate the propagation path of sound waves, and convert the sound energy into the heat energy of air vibration to be consumed, so that the noise produced by the driving wheel in the running process is obviously reduced, and the mute running experience of the cleaning equipment is improved.

In one possible implementation manner, the bottom surface of the hole-shaped structure corresponding to the first step is configured as the top surface of the solid structure at the first step in the axial direction of the annular main body, the top surface of the first step is a first tangential surface, the top surface of the second step is a second tangential surface in the radial direction of the annular main body, the dimension of the solid structure at the first step in the axial direction of the annular main body is greater than or equal to the dimension of the first tangential surface in the axial direction of the annular main body, and/or the bottom surface of the hole-shaped structure corresponding to the second step is configured as the top surface of the solid structure at the second step in the axial direction of the annular main body, and the dimension of the solid structure at the second step in the axial direction of the annular main body is greater than or equal to the dimension of the second tangential surface in the axial direction of the annular main body.

By configuring the bottom surface of the hole-like structure corresponding to the first step as the top surface of the solid structure at the first step, and the dimension of the solid structure in the axial direction being greater than or equal to the first tangential dimension (similarly applied to the second step), the tire is locally thickened and reinforced in the critical bearing area (at the first step and the second step), the structural rigidity and the impact resistance at the first step and the second step can be improved, and stress concentration due to the arrangement of the notch or the hole-like structure can be prevented.

In addition, through the accurate control to solid structure size, realized light-weighted and guaranteed the better balance between structural strength, avoided because the vibration that local wall thickness is too thin produced or because of the inertial shock that is too thick produced, restrained the vibration from the noise source head. The comprehensive effects of low noise and stable operation of the driving wheels are realized cooperatively, and the working silence and the comfort level of the cleaning equipment are obviously improved.

A second aspect of an embodiment of the application provides a cleaning apparatus comprising an apparatus body and a drive wheel as in any of the first aspects above.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural view of a driving wheel according to an embodiment of the present application;

FIG. 2 is a schematic view of a tire for a driving wheel according to an embodiment of the present application;

FIG. 3 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application;

FIG. 4 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application;

FIG. 5 is an enlarged schematic view of the tire shown in FIG. 4 at A;

FIG. 6 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application;

FIG. 7 is an enlarged schematic view of the structure at B of the tire shown in FIG. 6;

FIG. 8 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application;

FIG. 9 is a schematic cross-sectional view of a tire for a driving wheel according to an embodiment of the present application;

Fig. 10 is a schematic view of another angle of the cross-sectional view shown in fig. 9.

Reference numerals illustrate:

100-driving wheel, 10-tyre, 11-annular body;

111-first end face, 112-second end face, 12-gear teeth;

121-first side, 122-second side, 123-top;

124-groove structure, 125-hole structure, 126-center groove;

13-tooth slot, 141-first notch, 142-second notch;

143-first step, 1431-first section, 144-second step;

1441-a second tangential plane, 15-a tread, and 20-a hub.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The driving wheel is the core component of the travel and obstacle surmounting of the cleaning device, and the structural design of the tire (or "tread") directly determines the noise performance and obstacle surmounting capability of the device during operation. The tire of the related art is generally provided with a large number of deeper grooves on its outer circumferential surface to form a tread pattern. The design provides deformation space through the groove, and the tire can assist equipment to climb through effective deformation when facing barriers such as a threshold, a carpet batten and the like, so that the tire has relatively good barrier crossing performance.

However, such designs can produce significant operational noise when the tire is rolling on hard ground, with frequent tread-to-ground contact, impact, and compression and release of air within the groove, resulting in a poor user experience.

In order to improve the noise problem, the effective contact area between the tire and the ground is increased by encrypting the tire tread and reducing or shrinking the grooves in the related art, so that the tire rolls more stably, and the running noise can be reduced to a certain extent. However, this in turn leads to a reduced ability of the tire to deform, which greatly reduces the obstacle-crossing performance of the cleaning device and makes it difficult to cope with the low obstacles common in the domestic environment.

In order to solve the technical problems, embodiments of the present application provide a driving wheel and a cleaning device, where the driving wheel is used for the cleaning device. By providing asymmetric notch structures on the inside and outside of the tires of the drive wheel, noise reduction and improved obstacle surmounting capabilities of the cleaning apparatus can be achieved.

The following describes in detail the driving wheel and the cleaning apparatus provided by the embodiment of the present application with reference to the accompanying drawings.

Fig. 1 is a schematic structural diagram of a driving wheel according to an embodiment of the present application. Fig. 2 is a schematic structural view of a tire for a driving wheel according to an embodiment of the present application. Fig. 3 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application. Wherein fig. 3 is a front view of the tire.

For convenience of description, in the embodiment of the present application, the axial direction of the annular body of the tire is denoted as the x direction, and the circumferential direction of the annular body of the tire is denoted as the b direction.

As shown in fig. 1, an embodiment of the present application provides a drive wheel 100 for a cleaning apparatus. The drive wheel 100 may include, among other things, a tire 10 and a hub 20. The tire 10 is fitted over the outer side of the hub 20.

As shown in fig. 1 and 2, the driving wheel 100 may include a tire 10, and the tire 10 may include an annular body 11, and an outer circumferential surface of the annular body 11 is provided with a plurality of gear teeth 12 extending in an axial direction (x-direction) of the annular body 11. These teeth 12 are arranged at intervals along the circumferential direction (b direction) of the annular body 11, and tooth grooves 13 are formed between adjacent two teeth 12.

The axial (x-direction) both end surfaces of the annular main body 11 are a first end surface 111 and a second end surface 112, respectively, and the first end surface 111 is located inside the cleaning apparatus when the tire 10 is mounted to the cleaning apparatus. That is, when the driving wheel 100 is disposed on the cleaning apparatus, the first end face 111 faces the center position of the cleaning apparatus, and the second end face 112 is disposed near the outside of the cleaning apparatus.

It will be appreciated that in use, the drive wheels 100 are typically used in pairs, with the two drive wheels 100 disposed opposite one another and the first end faces 111 of the two drive wheels 100 disposed opposite one another, so that the drive wheels 100 are symmetrically disposed on the cleaning apparatus to enhance the operational stability of the cleaning apparatus.

As shown in fig. 2 and 3, the first end surface 111 has a plurality of first notches 141 formed therein, and the plurality of first notches 141 are arranged at intervals along the circumferential direction (b direction) of the annular body 11. Correspondingly, a plurality of second notches 142 are formed on the second end surface 112, and the plurality of second notches 142 are disposed at intervals along the circumferential direction (b direction) of the annular body 11. The plurality of first notches 141 and the plurality of second notches 142 are each recessed from the outer peripheral surface of the annular body 11 toward a direction approaching the center of the annular body 11, as viewed in the radial direction of the annular body 11. Wherein, the dimension L1 of the first notch 141 in the axial direction (x direction) of the annular body 11 is greater than or equal to the dimension L2 of the second notch 142 in the axial direction (x direction) of the annular body 11 (i.e., L1. Gtoreq.L2).

The "radial direction of the annular body 11" refers to a radial direction in a plane perpendicular to the central axis of the tire 10. In the embodiments of the application, reference is made to the thickness or height direction of the tire 10. For example, the height of the teeth 12 protruding outward from the surface of the annular body 11, and the depth of the inward depressions of the notch structure are measured and defined in the radial direction of the annular body 11.

According to the driving wheel 100 provided by the embodiment of the application, the dimension L1 of the first notch 141 in the axial direction (x direction) of the annular main body 11 is larger than or equal to the dimension L2 of the second notch 142 in the axial direction (x direction) of the annular main body 11, so that the cooperative promotion of low noise and high obstacle crossing performance can be realized.

Specifically, by setting the dimension of the first notch 141 on the first end surface 111 located inside the cleaning apparatus in the axial direction to be greater than or equal to the axial dimension of the second notch 142 on the second end surface 112 located outside, the first notch 141 with a larger dimension provides a larger deformation space and a better buffering capacity for the inside of the tire 10 when the tire is over the obstacle, so that the tire 10 can "wrap" or "fit" the edge of the obstacle through the preferential and sufficient deformation of the inside when encountering the obstacle, thereby generating larger traction force and traction force, and effectively improving the obstacle-over success rate and stability.

In addition, the design of the notches at the two end surfaces enables the structural rigidity distribution of the contact area between the tire 10 and the area to be cleaned to be optimized when the tire 10 rolls normally on flat ground, and vibration and slapping caused by uneven local deformation of the tread 15 (the contact surface between the tire 10 and the area to be cleaned) are reduced. In particular, the smaller size of the second gap 142 maintains the structural integrity of the outboard side of the tire 10 to some extent, suppressing excessive lateral vibration and noise emissions, thereby significantly reducing the noise level of the drive wheel 100 as a whole during normal operation.

That is, the driving wheel 100 provided in the embodiment of the present application respectively exerts different structural advantages under the obstacle surmounting condition and the steady operation condition, and finally achieves the synergistic technical effect of taking into account the excellent obstacle surmounting capability and the low operation noise.

With continued reference to fig. 2 and 3, in an embodiment of the present application, the dimension L1 of the first notch 141 in the axial direction (x-direction) of the annular body 11 is greater than the dimension L2 of the second notch 142 in the axial direction (x-direction) of the annular body 11.

That is, the first gap 141 is deeper in the x-direction so that during an asynchronous obstacle surmounting, when the cleaning device body rotates and the single drive wheel 100 is preferentially brought into contact with the obstacle, the inner side (first end surface 111) of the tire 10 of the rear contact obstacle will become the main force and grip area. By increasing the axial (x-direction) depth of the inner first notch 141, the grip at the first notch 141 is significantly increased. Thereby generating a greater traction force to assist the body of the cleaning apparatus to smoothly climb over the obstacle, effectively preventing the driving wheel 100 from slipping or stagnating on the obstacle. Enabling the drive wheel 100 to accommodate an asynchronous obstacle surmounting scenario improves the success rate and fluency of the cleaning apparatus across obstacles such as threshold, wire, carpet edges, etc., by enhancing the inside grip and impact resistance.

During steady operation, the outer side (the second end face 112) can maintain relatively high radial rigidity and high rigidity due to the smaller size of the second notch 142, so that abnormal deformation and high-frequency tremble at the edge of the footprint of the tire 10 are effectively restrained, and the running noise is reduced from the noise source.

Of course, in other embodiments, the dimension L1 of the first notch 141 in the axial direction (x direction) of the annular body 11 may be set equal to the dimension L2 (not shown in the figure) of the second notch 142 in the axial direction (x direction) of the annular body 11. That is, the first and second notches 141 and 142 have the same depth in the x direction, which can further reduce noise.

With continued reference to fig. 2 and 3, the orthographic projection of the first notch 141 and the orthographic projection of the second notch 142 on the first plane do not overlap each other. Wherein the first plane is perpendicular to the axial direction (x-direction) of the annular body 11, wherein the first plane is parallel to the first end face 111 and the second end face 112.

It should be noted that, "the front projection of the first notch 141 on the first plane and the front projection of the second notch 142 on the first plane do not overlap" may specifically be that the front projection of the first notch 141 on the first plane and the front projection of the second notch 142 on the first plane are separated from each other, or the front projection of the first notch 141 on the first plane and the front projection of the second notch 142 on the first plane are adjacent to each other.

This arrangement allows the physical structure of the tire 10 in the axial direction (x-direction) to be maintained to a maximum extent at any one of the radial and circumferential (b-direction) positions of the tire 10. That is, the second notch 142 is not provided at the corresponding second end face 112 at the position where the first notch 141 is provided at the first end face 111, and the first notch 141 is not provided at the corresponding first end face 111 at the position where the second notch 142 is provided at the second end face 112. The first notches 141 and the second notches 142 are alternately arranged along the circumferential direction of the annular body 11.

Therefore, when the first notch 141 or the second notch 142 deforms in the obstacle crossing process, continuous solid materials which are not completely cut off by the notches are always arranged at the parts except the first notch 141 and the second notch 142 to serve as force transmission frameworks, so that more uniform and firmer supporting force is provided, structural collapse or abrupt change of supporting force possibly caused by alignment of the notches on the inner side and the outer side is avoided, and the obstacle crossing process is more stable and reliable.

In terms of noise control, this staggered arrangement significantly improves the overall structural rigidity of the grip region of the tire 10, effectively suppressing flapping vibrations due to insufficient local rigidity, and fundamentally reducing the generation of noise.

In some embodiments, the orthographic projection of the first notch 141 on the first plane and the orthographic projection of the second notch 142 on the first plane are disposed in order along the circumferential direction (direction b) of the annular body 11 and abut each other.

So configured, orthographic projections of the first notch 141 and the second notch 142 on the first plane are sequentially disposed along the circumferential direction (b direction) and abut against each other, forming a continuous or near continuous circumferential groove layout. This structure enhances the flexibility and the ground contact adaptability of the tire 10, and enables the tire 10 to better conform to the ground through the elastic deformation of the notched areas (the first notch 141, the second notch 142) when encountering uneven ground, thereby improving the obstacle surmounting capability and the cleaning efficiency of the cleaning apparatus. In addition, the abutting projection design expands the effective drainage or dust removal path of the tire 10 surface, helping to quickly conduct media out in wet or dry cleaning scenarios, preventing slippage or clogging, and improving equipment reliability.

Fig. 4 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application. Fig. 5 is an enlarged schematic view of the structure at a of the tire shown in fig. 4.

Referring to fig. 4 and 5, a dimension L3 of the first notch 141 in the circumferential direction (b direction) of the annular body 11 is equal to a dimension L4 of the second notch 142 in the circumferential direction (b direction) of the annular body 11.

This allows the tire 10 to form a regular and symmetrical mechanical transmission path in the radial direction. When the tire 10 deforms in the obstacle crossing process, the inner and outer first notches 141 and the second notches 142 can generate coordinated deformation response, abnormal distortion or stress concentration caused by mismatch of deformation in the circumferential direction (b direction) is avoided, and stability and structural reliability of the driving wheel 100 when climbing over the obstacle are ensured. At the same time, this regular geometry also helps to maintain uniform contact and separation of the tire 10 with the ground during rolling, reducing vibration and noise caused by irregular impacts.

Of course, in other embodiments, the dimension L3 of the first notch 141 in the circumferential direction (b direction) of the annular main body 11 may be set to be larger than the dimension L4 of the second notch 142 in the circumferential direction (b direction) of the annular main body 11, so that the dimension of the first notch 141 in the b direction may be further enlarged, so that when the obstacle is surmounted asynchronously (the body of the cleaning apparatus is first over against the obstacle, then the body is rotated to first drive wheel 100 and then to drive another drive wheel 100), the tire 10 of the first drive wheel 100 is in contact with the obstacle on the outside, and the tire 10 of the last drive wheel 100 is in contact with the obstacle on the inside, so that the dimension of the first notch 141 located on the inside is larger in the circumferential direction, a stronger grip can be obtained, thereby improving the obstacle surmounting capability.

In the embodiment of the present application, the size relationship between the dimension L3 of the first notch 141 in the circumferential direction (b direction) of the annular body 11 and the dimension L4 of the second notch 142 in the circumferential direction (b direction) of the annular body 11 is not further limited.

Fig. 6 is a schematic view of another angle of a tire for a driving wheel according to an embodiment of the present application. Fig. 7 is an enlarged schematic view of the structure at B of the tire shown in fig. 6.

As shown in fig. 6 and 7, in the circumferential direction (b direction) of the annular body 11, first steps 143 are formed on both sides of each first notch 141, and second steps 144 are formed on both sides of each second notch 142. That is, the first notches 141 and the first steps 143 are alternately arranged as seen from the first end surface 111. The second notches 142 and the second steps 144 alternate as seen from the second end surface 112.

Illustratively, the first step 143 and/or the second step 144 are solid structures. That is, at least one of the first step 143 and the second step 144 is a solid structure. For example, the first step 143 and the second step 144 are solid structures.

By forming the first step 143 on both sides of each first notch 141 and the second step 144 on both sides of each second notch 142 in the circumferential direction (direction b) of the annular body 11, the first step 143 and the second step 144 are each of a solid structure, so that a firm boundary support can be provided for each notch in the circumferential direction (direction b) of the annular body 11.

When the obstacle surmounting is performed, when the gap area is pressed and deforms to provide necessary gripping force, the solid step structures positioned at the two sides of the gap area can effectively limit the excessive expansion of deformation, and prevent stress from being transferred randomly in the whole tire 10 structure, so that the structural integrity and durability of the tire 10 under the limit deformation can be improved, the problem of tearing of the tire 10 is avoided, and each obstacle surmounting action is ensured to be stable and controllable.

In addition, these solid step structures can enhance the rigidity of the tire 10 during smooth running, and can effectively suppress high frequency vibrations and noise generated by notch edge flexible vibration.

Illustratively, the first gap 141 spans at least two gear teeth 12 in the circumferential direction (b-direction) of the annular body 11. And/or the second notch 142 spans at least two gear teeth 12 in the circumferential direction (b-direction) of the annular body 11. For example, the first notch 141 and the second notch 142 each span two, three, four teeth 12, or the like in the circumferential direction (b direction) of the annular body 11.

So configured, when the tire 10 is in contact with the edge of an obstacle during obstacle crossing, such large-span notches (first notch 141 and second notch 142) can simultaneously guide the plurality of gear teeth 12 to produce consistent deformation, thereby forming a larger area of contact and wrap between the tire 10 and the obstacle. In this way, the adhesive force during climbing can be enhanced, slipping of the single gear teeth 12 due to overlarge stress is effectively prevented, the obstacle surmounting process is stable and continuous, and the capability and success rate of the driving wheel 100 for dealing with higher obstacles are remarkably improved.

In addition, when the tire 10 rolls, the long notches (the first notch 141 and the second notch 142) crossing the plurality of gear teeth 12 can orderly deform and recover at a lower frequency and a larger amplitude, and compared with the high-frequency and rapid slapping of a single gear tooth 12, the low-frequency deformation mode has the advantages of smaller generated working noise, lower sound quality and less possibility of being inspired.

In the above embodiment, the embodiment was described in which the first notch 141 spans the same number of gear teeth 12 in the circumferential direction (direction b) of the annular body 11 as the second notch 142 spans the same number of gear teeth 12 in the circumferential direction (direction b) of the annular body 11.

Of course, in other implementations, the number of teeth 12 spanned by the first notch 141 in the circumferential direction (b-direction) of the annular body 11 may be different from the number of teeth 12 spanned by the second notch 142 in the circumferential direction (b-direction) of the annular body 11. For example, the first notch 141 spans three gear teeth 12 in the circumferential direction (b direction) of the annular body 11, and the second notch 142 spans two gear teeth 12 in the circumferential direction (b direction) of the annular body 11. In the embodiment of the present application, the number of the teeth 12 spanned by the first notch 141 in the circumferential direction (b direction) of the annular body 11 and the number of the teeth 12 spanned by the second notch 142 in the circumferential direction (b direction) of the annular body 11 are not limited.

In some embodiments, the first step 143 spans at least two gear teeth 12 in the circumferential direction (b-direction) of the annular body 11. And/or the second step 144 spans at least two gear teeth 12 in the circumferential direction (b-direction) of the annular body 11. For example, the first step 143 and the second step 144 each span two, three, four teeth 12, or the like in the circumferential direction (b direction) of the annular body 11.

By doing so, the structural stability and impact resistance of the drive wheel 100 under obstacle surmounting conditions may be enhanced. So that the reinforcement support provided by the first step 143 or the second step 144 covers a larger circumferential area, the wide steps across the plurality of gear teeth 12 can effectively spread the concentrated stress over a larger contact area when the tire 10 encounters an obstacle to impact, avoiding deformation or damage to the tire 10 caused by localized stress concentrations. Under the complex stress condition of the cleaning equipment in obstacle crossing, the rigidity of key parts of the tire 10 is enhanced, enough structural strength is ensured to bear impact load, and the necessary flexible deformability of the tire 10 is maintained through the cooperation of the first notch 141 or the second notch 142, so that the service life of the driving wheel is prolonged while the obstacle crossing performance is ensured.

In the above embodiment, the embodiment was described in which the number of gear teeth 12 spanned by the first step 143 in the circumferential direction (b direction) of the annular body 11 is the same as the number of gear teeth 12 spanned by the second step 144 in the circumferential direction (b direction) of the annular body 11.

Of course, in other implementations, the number of teeth 12 spanned by the first step 143 in the circumferential direction (b-direction) of the annular body 11 may be different from the number of teeth 12 spanned by the second step 144 in the circumferential direction (b-direction) of the annular body 11. For example, the first step 143 spans three gear teeth 12 in the circumferential direction (b direction) of the annular body 11, and the second step 144 spans two gear teeth 12 in the circumferential direction (b direction) of the annular body 11. In the embodiment of the present application, the number of gear teeth 12 spanned by the first step 143 in the circumferential direction (b direction) of the annular body 11 and the number of gear teeth 12 spanned by the second step 144 in the circumferential direction (b direction) of the annular body 11 are not limited.

In some embodiments, referring to fig. 5 and 7, the dimension L5 of the first step 143 in the circumferential direction (b direction) of the annular body 11 is equal to the dimension L6 of the second step 144 in the circumferential direction (b direction) of the annular body 11. This ensures that the tire 10 has uniform structural rigidity distribution on both sides in the axial direction (x-direction), and when the tire 10 receives lateral forces or obstacle surmounting impacts from different directions, the deformation response of the inner and outer sides and the force transmission path are symmetrical and synchronous, which effectively avoids the problems of deviation, abnormal wear or local stress concentration caused by uneven supporting strength on both sides, thereby improving the running stability and durability of the driving wheel 100.

Of course, in some embodiments, the dimension L5 of the first step 143 in the circumferential direction (b direction) of the annular body 11 may also be set larger than the dimension L6 of the second step 144 in the circumferential direction (b direction) of the annular body 11. That is, the first step 143 of the solid structure located on the inner side is larger in size in the circumferential direction (b direction) of the annular body 11.

Under the impact load of the asynchronous obstacle surmounting, the inner side of the rear upper driving wheel 100 is subjected to a larger torsion force. The larger circumferential dimension of the solid first step 143 may enhance the rigidity and anti-twist capabilities of the inboard hub 20 structure, better resisting surmounting impacts, and preventing structural damage. While the outer side maintains a relatively compact structure, which combines light weight and daily driving stability. The differential design based on the actual stress condition optimizes the load distribution of the driving wheel 100 and improves the overall durability and service life of the driving wheel.

As an example, the dimension L3 of the first notch 141 in the circumferential direction (b direction) of the annular body 11, the dimension L4 of the second notch 142 in the circumferential direction (b direction) of the annular body 11, the dimension L5 of the first step 143 in the circumferential direction (b direction) of the annular body 11, and the dimension L6 of the second step 144 in the circumferential direction (b direction) of the annular body 11 may be the same.

This may simplify the design and manufacture of the tire 10 mold. The mold cores for forming the notches and the steps on the mold can be designed and processed by adopting identical dimension specifications, so that the complexity, the manufacturing cost and the assembly time of the mold can be greatly reduced, the fluctuation of the product quality caused by the accumulation of a plurality of dimension tolerances can be eliminated, and the product quality is improved.

From a structural mechanical point of view, the design may form regular and symmetrical "deformation-supporting" periodic units in the circumferential direction of the tire 10. Each periodic unit is composed of alternating deformation zones (notches) and rigid zones (steps) of identical dimensions. This symmetry ensures that the tire 10 is consistent in the period of its stiffness change in contact with the ground when rolling, regardless of the angle to which it rotates, thus improving the stability of the cleaning device in motion, effectively avoiding vibrations and noise due to abrupt changes in the periodic stiffness, and making the device more quiet and smooth in operation.

With continued reference to fig. 5 and 7, the annular body 11 is provided with a hole-like structure 125 extending in the axial direction (x-direction) of the annular body 11 in the region of the non-solid structure. Wherein, the hole-shaped structure 125 corresponding to the first step 143 is communicated with the second notch 142, and the hole-shaped structure 125 corresponding to the second step 144 is communicated with the first notch 141.

Illustratively, the cross-sectional shape of the aperture structure 125 may be circular, rectangular, or polygonal. In the embodiment of the present application, the cross-sectional shape of the hole-like structure 125 is not further limited.

In the embodiment of the present application, as shown in fig. 5 and 7, the cross-sectional shape of the hole-like structure 125 is a structure similar to a rectangle in which four corners are rounded.

By introducing the axial (x-direction) hole-like structures 125 at the first step 143 and the second step 144, etc., the amount of material used is significantly reduced, the manufacturing cost is reduced, the moment of inertia of the drive wheel 100 is also reduced, and the quick response and the reduction of energy consumption during the start and stop of the cleaning device are facilitated. By communicating the hole-like structure 125 corresponding to the first step 143 with the second notch 142 and communicating the hole-like structure 125 corresponding to the second step 144 with the first notch 141, the processing difficulty can be reduced.

By communicating the aperture structure 125 with the external first or second indentations 141, 142, an acoustic damping structure may be formed. When the tire 10 rolls to rub against the ground or collide with obstacles to generate vibration and noise, the mutually communicated cavities can effectively block and attenuate the propagation path of sound waves and convert the sound energy into heat energy of air vibration to be consumed, thereby remarkably reducing the noise generated by the driving wheel in the running process and improving the mute running experience of the cleaning equipment.

In some embodiments, the open end of the hole-like structure 125 has a larger dimension than the bottom end, which may form a draft angle from the bottom end to the open end of the hole-like structure 125, which may reduce processing difficulty.

As shown in fig. 8, the gear teeth 12 may include tooth tops 123, the tooth tops 123 for contacting a surface to be cleaned. Illustratively, in the b direction, two ends of the tooth top 123 are a first side 121 and a second side 122, where the first side 121 and the second side 122 are symmetrically disposed at two ends of the tooth top 123, and the first side 121 and the second side 122 are disposed at an angle with the tooth top 123, so that a tooth slot 13 is formed between two adjacent teeth 12.

Of course, in other embodiments, the first side 121 and the second side 122 may be provided asymmetrically, for example, the angles between the first side 121 and the second side 122 and the tooth top 123 may be different. In the embodiment of the present application, the included angle between the tooth top 123 and the first side surface 121 and the second side surface 122 is not further limited.

In some embodiments, the distance h from the bottom of the tooth slot 13 to the tooth top 123 of the tooth 12 may be between 0.5 millimeters and 5 millimeters.

Illustratively, the distance h from the bottom of the tooth slot 13 to the plane of the top surface of the tooth 12 may be 0.5 millimeters, 1 millimeter, 1.5 millimeters, 2 millimeters, 2.5 millimeters, 3 millimeters, 3.5 millimeters, 4 millimeters, 4.5 millimeters, or 5 millimeters. In the embodiment of the present application, the specific value of the distance h from the bottom of the tooth slot 13 to the plane of the top surface of the tooth 12 is not further limited.

By controlling the distance from the bottom of the tooth slot 13 to the plane of the top surface of the tooth 12 to be in the range of 0.5 mm to 5mm, common ground obstacles (such as carpet fibers, raised threshold or tiny sundries) can be effectively accommodated, and the effective contact area between the tooth 12 and the ground is maintained while foreign matter jamming is avoided. The moderate depth of the tooth slots 13 ensures that the teeth 12 have sufficient effective engagement height to provide a strong grip when surmounting the obstacle, and also avoids stress concentrations or structural strength degradation due to the tooth slots 13 being too deep.

In addition, the depth range can ensure that the tire 10 can still keep multiple teeth to simultaneously contact the ground when rolling on the flat ground, effectively disperse pressure and reduce vibration, thereby achieving both obstacle-surmounting stability and smoothness of daily running. This significantly improves the adaptability of the drive wheel 100 to complex floor environments, enabling the cleaning apparatus to span obstacles of varying heights smoothly and efficiently.

As shown in fig. 5, 7 and 8, in the radial direction of the annular body 11, the top surface of the first step 143 is a first tangential surface 1431, the top surface of the second step 144 is a second tangential surface 1441, and the first tangential surface 1431 is lower than the tooth top 123 and higher than the bottom of the tooth slot 13. And/or the second tangential plane 1441 is lower than the tooth top 123 and higher than the bottom of the tooth slot 13. In the present embodiment, the first cutting surfaces 1431 are each lower than the tooth top surface 123 and are each higher than the bottom of the tooth slot 13.

Illustratively, the first and second tangential surfaces 1431, 1441 are located on the same annular surface from the axis of the drive wheel 100, that is, the first and second tangential surfaces 1431, 1441 are flush in the radial direction of the annular body 11. The first and second tangential surfaces 1431 and 1441 may be located at a position intermediate the tooth top surface 123 and the bottom of the tooth groove 13, that is, the first and second tangential surfaces 1431 and 1441 are spaced from the tooth top surface 123 by the same distance as the bottom of the tooth groove 13 in the radial direction of the annular body 11. Of course, other positions may be provided, and in the embodiment of the present application, the specific positions of the first tangential plane 1431 and the second tangential plane 1441 are not further limited.

By providing a plurality of gear teeth 12 and forming the tooth grooves 13 by adjacent gear teeth 12, the gear teeth 12 and the tooth grooves 13 form a main driving surface, and the basic grip and cleaning effect of the driving wheel 100 on a flat ground, a carpet and other complex ground are ensured. By setting the heights of the first and second tangential surfaces 1431 and 1441 between the tooth top 123 and the tooth slot 13, a secondary functional contact surface can be formed at the first and second tangential surfaces 1431 and 1441.

When the gear teeth 12 are greatly deformed due to obstacle climbing during obstacle crossing, and the tooth top 123 is possibly separated from contact temporarily, the first tangential surface 1431 and the second tangential surface 1441 with moderate positions can be in contact with the obstacle in time to provide auxiliary supporting and pushing actions, so that the reliability and stability of obstacle crossing are obviously improved, and slipping or blocking is prevented.

In smooth operation, the first and second tangential surfaces 1431 and 1441 lower than the tooth top surface 123 are not normally contacted with the surface to be cleaned, thereby avoiding frictional noise generated due to an excessively large contact area. In addition, the provision of the first and second tangential surfaces 1431 and 1441 can reduce the weight of the tire 10, reduce the use of materials, and further reduce the cost.

With continued reference to fig. 7, the tooth top 123 is provided with a plurality of groove structures 124 spaced apart along the axial direction (x-direction) of the annular body 11. Illustratively, the plurality of groove structures 124 are all the same shape. Of course, in other embodiments, the shape of some of the groove structures 124 in the plurality of groove structures 124 may be different. The shape of the plurality of groove structures 124 is not further defined in embodiments of the present application.

By providing the groove structure 124 on the tooth top 123, the actual contact area and surface roughness of the tooth top 123 when it contacts the floor to be cleaned (particularly, a smooth hard floor) can be effectively increased. The friction coefficient and the grip force of the tire 10 can be remarkably enhanced, the slip spin phenomenon of the driving wheel 100 at the time of starting, accelerating or surmounting can be prevented, and the high efficiency of the power transmission and the running stability of the cleaning apparatus can be ensured. The spaced groove structures 124 form resilient groove areas on the tooth top 123 that allow for micro-deformation when the drive wheel 100 rolls over small obstacles or ground joints, providing additional cushioning, helping to smoothly ride over obstacles, reducing jolts and shocks, improving the smoothness of the device's passage, and helping to protect the device's internal structure from severe vibrations.

In addition, the plurality of groove structures 124 arranged at intervals effectively divide the contact area between the tooth top surface 123 and the ground, and break through the air flow adsorption and vacuum pumping effect possibly generated by the continuous contact surface, so that the pneumatic noise during high-speed rolling can be reduced. In addition, these groove structures 124 serve as minute deformation units, and can absorb and cushion high-frequency vibrations generated when the tire 10 is brought into contact with microscopic irregularities on the ground, further suppressing the generation of noise from the source.

Illustratively, as shown in fig. 7 and 9, the tooth top 123 is provided with a center groove 126, and the center groove 126 is located at the center in the axial direction (x-direction) of the annular body 11. Wherein the dimension of the central groove 126 in the axial direction (x-direction) of the annular body 11 is larger than the dimension of any one groove structure 124 of the plurality of groove structures 124 in the axial direction (x-direction) of the annular body 11. The dimension of the central groove 126 in the radial direction of the annular body 11 is the same as the dimension of the plurality of groove structures 124 in the radial direction of the annular body 11.

By providing a central recess 126 of greater size in the middle of the tooth top 123, a primary deformation zone can be formed in the middle of the tire 10, which zone can preferentially deform moderately when surmounting an obstacle or requiring high traction, enhancing the "biting" action of the tire 10 on an obstacle or surface to be cleaned, and improving the throughput and driving force, while the recess structures 124 with smaller sides can provide additional deformation and stable edge support. In addition, from the perspective of cleaning and drainage, all grooves together form an efficient drainage and debris removal network. Particularly, the large-sized central groove 126 serves as a main channel for rapidly guiding water flow and tiny particles to be discharged to both sides, effectively preventing the tire 10 from slipping on a slippery ground, and preventing dirt from adhering to the tread 15 to affect the grip and cleaning effect.

Referring to fig. 9 and 10, the tooth tops 123 of the plurality of teeth 12 are all the same in size in the axial direction (x direction) of the ring-shaped body 11, and both ends of the tooth tops 123 of the plurality of teeth 12 in the axial direction (x direction) of the ring-shaped body 11 are respectively aligned with each other. The tooth top 123 of all the teeth 12 is arranged as a tread 15 of the tyre 10 on the outer circumferential surface forming surface of the annular body 11, the tread 15 being intended to be in contact with the surface to be cleaned, in use.

By conforming the tooth top 123 of the plurality of teeth 12 in the axial direction (x-direction) and aligning the ends, a continuous, flat effective ground plane is formed. So that the pressure can be uniformly distributed when the driving wheel 100 is in contact with the ground, local abrasion due to uneven pressure is avoided, or the body of the cleaning apparatus shakes, thereby providing stable, efficient and reliable driving performance.

Illustratively, a dimension L1 of the first notch 141 in the axial direction (x-direction) of the annular body 11 is the same as a dimension T1 of the first cutout 1431 in the axial direction (x-direction) of the annular body 11. And/or, a dimension L2 of the second notch 142 in the axial direction (x direction) of the annular body 11 is the same as a dimension T2 of the second tangential plane 1441 in the axial direction (x direction) of the annular body 11.

By doing so, it is possible to ensure that the deformation space provided by the notch (first notch 141 and second notch 142) is perfectly aligned with the auxiliary support function provided by the tangential plane (first tangential plane 1431 and second tangential plane 1441) in the axial direction (x-direction), forming an effective "deformation-support" cooperative unit. When the tire 10 is over the obstacle, stress and the like can be smoothly transferred between the notch deformation region and the tangent plane supporting region, so that stress concentration or local bending caused by size dislocation is avoided, and the structural durability of the tire 10 and the continuity of the obstacle crossing action are improved.

In addition, from the viewpoint of the production process, the complexity of the mold can be greatly simplified. The axial (x-direction) boundary of the notch and the axial (x-direction) boundary of the tangential plane are coplanar or formed by the same die structure at one time, which not only reduces the components and assembly tolerance of the die, but also obviously reduces the demolding difficulty, improves the manufacturing precision and batch consistency of the tire 10, and is beneficial to cost control and quality stabilization.

In some embodiments, each gear tooth 12 may include a solid portion and a hollow portion. For example, the end of the gear tooth 12 facing the first end surface 111 is a hollow portion, and the end of the gear tooth 12 facing the second end surface 112 is a solid portion. The end of the gear tooth 12 facing the second end face 112 is a hollow portion, and the end of the gear tooth 12 facing the first end face 111 is a solid portion. Wherein the solid portion is configured as a first step 143 or a second step 144, and the hollow portion corresponds to the first notch 141 or the second notch 142, respectively. By providing the gear teeth 12 with a portion including a solid portion and a hollow portion, the bearing performance of the gear teeth 12 can be ensured, and the weight of the tire 10 can be reduced, thereby saving costs.

The solid structure at the first step 143 and the second step 144 will be described below.

As shown in fig. 9, in the axial direction (x-direction) of the annular body 11, the bottom surface of the hole-like structure 125 corresponding to the first step 143 is configured as the top surface of the solid structure at the first step 143. And/or, in the axial direction (x-direction) of the annular body 11, the bottom surface of the hole-like structure 125 corresponding to the second step 144 is configured as the top surface of the solid structure at the second step 144. That is, the hole-like structure 125 is a blind hole, and the portion that is not opened is a solid structure portion of the first step 143 or the second step 144.

Illustratively, a dimension m1 of the solid structure at the first step 143 in the axial direction (x-direction) of the annular body 11 is equal to or greater than a dimension T1 of the first tangential plane 1431 in the axial direction of the annular body 11. And/or, a dimension m2 of the solid structure at the second step 144 in the axial direction of the annular body 11 is equal to or greater than a dimension T2 of the second tangential plane 1441 in the axial direction of the annular body 11.

By configuring the bottom surface of the hole-like structure 125 corresponding to the first step 143 as the top surface of the solid structure at the first step 143, and the dimension of the solid structure in the axial direction being greater than or equal to the first tangential surface 1431 dimension (similarly applied to the second step 144), so that the tire 10 is locally thickened and reinforced in the critical bearing area (at the first step 143 and the second step 144), the structural rigidity and the impact resistance at the first step 143 and the second step 144 can be improved, preventing the stress concentration due to the provision of the notch or the hole-like structure 125.

In some embodiments, as shown in connection with fig. 9 and 10, the dimension m1 of the solid structure at the first step 143 in the axial direction of the annular body 11 is the same as the dimension T1 of the first tangential plane 1431 in the axial direction (x-direction) of the annular body 11. This ensures the strength of the first step 143 while ensuring the minimum mass of the tire 10, thereby reducing the cost.

Illustratively, a difference between a dimension m1 of the solid structure at the first step 143 in the axial direction of the annular body 11 and a dimension T1 of the first tangential plane 1431 in the axial direction (x-direction) of the annular body 11 is less than or equal to 1mm. This ensures the strength of the first step 143 and also ensures the noise reduction and vibration effects of the arrangement of the hole-like structure 125.

With continued reference to fig. 9 and 10, the dimension m2 of the solid structure at the second step 144 in the axial direction of the annular body 11 is greater than the dimension T2 of the second tangential plane 1441 in the axial direction (x-direction) of the annular body 11. This can improve the structural strength of the second step 144.

Illustratively, a difference between a dimension m2 of the solid structure at the second step 144 in the axial direction of the annular body 11 and a dimension T2 of the second tangential plane 1441 in the axial direction (x-direction) of the annular body 11 is less than or equal to 1mm. This ensures the strength of the second step 144 and also the noise reduction and vibration effect of the arrangement of the hole-like structure 125.

In some embodiments, the dimension of the solid structure at the first step 143 in the axial direction (x-direction) of the annular body 11 is greater than or equal to the dimension of the first notch 141 in the axial direction of the annular body 11. The dimension of the solid structure at the second step 144 in the axial direction (x-direction) of the annular body 11 is greater than or equal to the dimension of the second notch 142 in the axial direction of the annular body 11.

Illustratively, as shown in fig. 10, the dimension m1 of the solid structure at the first step 143 in the axial direction of the annular body 11 is equal to the dimension L1 of the first notch 141 in the axial direction of the annular body 11.

Of course, in other embodiments, the solid structure at the first step 143 may be set to be larger in size in the axial direction of the annular body 11 than the first notch 141 in the axial direction of the annular body 11. In the embodiment of the present application, the dimensional relationship between the dimension of the solid structure at the first step 143 in the axial direction of the annular body 11 and the dimension of the first notch 141 in the axial direction of the annular body 11 is not further limited.

With continued reference to fig. 10, the dimension m2 of the solid structure at the second step 144 in the axial direction of the annular body 11 is greater than the dimension L2 of the second notch 142 in the axial direction of the annular body 11.

Of course, in other embodiments, the solid structure at the second step 144 may also be set to a size in the axial direction of the annular body 11 equal to the size of the second notch 142 in the axial direction of the annular body 11. In the embodiment of the present application, the dimensional relationship between the dimension of the solid structure at the second step 144 in the axial direction of the annular body 11 and the dimension of the second notch 142 in the axial direction of the annular body 11 is not further limited.

In the embodiment of the present application, the dimension of the solid structure in the axial direction (x direction) of the annular body 11 may be set to be equal to the dimension of the notch in the axial direction of the annular body 11, and of course, in other embodiments, the dimension of the solid structure in the axial direction (x direction) of the annular body 11 may be set to be larger, so that the solid structure may be widened, thereby providing a larger bearing section for the notch area, and when the gear teeth 12 engage the obstacle, the impact load can be uniformly dispersed into the inside of the annular body 11 in the axial direction through the widened solid structure, thereby avoiding local plastic deformation caused by stress concentration.

The increased size of the solid structure significantly improves the torsional rigidity of the rim of the tire 10, and when the driving wheel 100 receives a lateral moment (such as an oblique contact step) during obstacle crossing, the widened solid structure can effectively inhibit circumferential distortion, maintain the optimal engagement angle of the gear teeth 12 and the obstacle, and reduce energy loss caused by the distortion.

Embodiments of the present application also provide a cleaning apparatus comprising an apparatus body and the drive wheel 100 of any of the embodiments described above. The cleaning device may be a floor washer, a sweeper, a cleaner or the like. In embodiments of the present application, the particular type of cleaning device is not further limited.

In this specification, each embodiment or implementation is described in a progressive manner, and each embodiment focuses on a difference from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present application and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application.

In the description of the present application, it should be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements that are expressly listed or inherent to such process, method, article, or apparatus.

Unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly as being either permanently connected or removably connected or integrally formed, or as being directly connected or indirectly connected through an intervening medium such that two elements may be interconnected or in an interactive relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.

It should be noted that the above embodiments are merely for illustrating the technical solution of the present application and not for limiting the same, and although the present application has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A drive wheel for a cleaning apparatus, the drive wheel comprising:

The tire comprises an annular main body, wherein two axial end faces of the annular main body are a first end face and a second end face respectively, when the tire is assembled on cleaning equipment, the first end face is positioned on the inner side of the cleaning equipment, wherein,

A plurality of first notches are formed on the first end face and are arranged at intervals along the circumferential direction of the annular main body;

a plurality of second notches are formed on the second end face and are arranged at intervals along the circumferential direction of the annular main body;

In the radial direction of the annular main body, the first notch and the second notch are recessed from the outer peripheral surface of the annular main body to a direction approaching the center of the annular main body;

the first notch has a dimension in the axial direction of the annular body that is greater than or equal to the dimension of the second notch in the axial direction of the annular body.

2. The drive wheel of claim 1, wherein a dimension of the first gap in an axial direction of the annular body is greater than a dimension of the second gap in an axial direction of the annular body.

3. The drive wheel of claim 1, wherein the orthographic projection of the first notch on a first plane and the orthographic projection of the second notch on the first plane do not overlap each other, wherein,

The first plane is perpendicular to an axial direction of the annular body.

4. A drive wheel according to claim 3, wherein the orthographic projection of the first notch on the first plane and the orthographic projection of the second notch on the first plane are disposed in sequence along the circumference of the annular body and abut each other.

5. The drive wheel of claim 1, wherein a dimension of the first gap in a circumferential direction of the annular body is equal to a dimension of the second gap in the circumferential direction of the annular body.

6. The drive wheel according to any one of claims 1 to 5, characterized in that in the circumferential direction of the annular body, first steps are formed on both sides of each of the first notches, and second steps are formed on both sides of each of the second notches;

the first step and/or the second step is/are of a solid structure.

7. The drive wheel of claim 6, wherein the outer peripheral surface of the annular body is provided with a plurality of gear teeth extending axially along the annular body, wherein,

The gear teeth are arranged at intervals along the circumferential direction of the annular main body, and tooth grooves are formed between two adjacent gear teeth;

The gear teeth comprise tooth tops for contacting a surface to be cleaned;

in the radial direction of the annular main body, the top surface of the first step is a first tangential surface, and the top surface of the second step is a second tangential surface;

the first tangential plane is lower than the tooth top surface and higher than the bottom of the tooth slot, and/or,

The second tangent plane is lower than the tooth top surface and higher than the bottom of the tooth groove.

8. The drive wheel of claim 7, wherein the first notch has a dimension in an axial direction of the annular body that is the same as a dimension of the first cutout in the axial direction of the annular body, and/or,

The second notch has the same dimension in the axial direction of the annular body as the second tangential plane.

9. The drive wheel of claim 8, wherein the first gap spans at least two of the gear teeth in the circumferential direction of the annular body, and/or,

The second notch spans at least two of the gear teeth in the circumferential direction of the annular body.

10. The drive wheel of any one of claims 7-9, wherein the tooth top is provided with a plurality of groove structures axially spaced along the annular body.

11. The drive wheel of claim 10, wherein the tooth top surface is provided with a center groove at a central portion in an axial direction of the annular body, wherein,

The dimension of the central groove in the axial direction of the annular main body is larger than the dimension of any one of the groove structures in the axial direction of the annular main body;

the dimension of the central groove in the radial direction of the annular main body is the same as the dimension of the groove structures in the radial direction of the annular main body.

12. The drive wheel according to claim 10, wherein the tooth tops of the plurality of the teeth are all the same in size in the axial direction of the annular body, and both ends of the tooth tops of the plurality of the teeth in the axial direction of the annular body are respectively aligned with each other.

13. The drive wheel of claim 6, wherein a dimension of the first step in a circumferential direction of the annular body is equal to a dimension of the second step in the circumferential direction of the annular body.

14. The drive wheel of claim 6, wherein the annular body is provided with a hole-like structure extending axially along the annular body in a region other than the solid structure, wherein,

The hole-shaped structure corresponding to the first step is communicated with the second notch;

the hole-shaped structure corresponding to the second step is communicated with the first notch.

15. The drive wheel according to claim 14, wherein a bottom surface of the hole-like structure corresponding to the first step is configured as a top surface of a solid structure at the first step in an axial direction of the endless body;

the dimension of the solid structure at the first step in the axial direction of the annular body is greater than or equal to the dimension of the first tangential plane in the axial direction of the annular body, and/or,

In the axial direction of the annular body, the bottom surface of the hole-like structure corresponding to the second step is configured as the top surface of the solid structure at the second step;

The dimension of the solid structure at the second step in the axial direction of the annular body is greater than or equal to the dimension of the second tangential plane in the axial direction of the annular body.

16. A cleaning appliance comprising an appliance body and a drive wheel as claimed in any one of claims 1 to 15.